geographic region vs East

geographic region and East both are nouns.

Word	Noun	Adjective	Verb	Adverb
geographic region	Yes	No	No	No
East	Yes	No	No	No

geographic region (noun)	East (noun)
a demarcated area of the Earth	the countries of Asia
	the region of the United States lying to the north of the Ohio River and to the east of the Mississippi River